The national security adviser also used the event to criticize Venezuela and Nicaragua, which, together with Cuba, he described as "the troika of tyranny."

"The United States looks forward to watching each corner of this sordid triangle of terror fall: in Havana, in Caracas and in Managua."

Bolton announced new sanctions on the Central Bank of Venezuela, which he said props up the regime of Venezuelan President Nicolas Maduro, and Bancorp, which he described as a "slush fund" for Nicaraguan President Daniel Ortega.